3com 3031 Instruccion De Instalación

This chapter tells you the following:

■

Introduction to Modem Functions in V2.0

■

How To Configure Modems

■

Typical Modem Configurations

■

Troubleshooting Modem Configurations

Modem is a network device that is widely used. It is important for a router to 
properly manage and control the use of modem in a network. However, there are 
many modem manufacturers and various modem models. Even though all of them 
support the AT command set and are compliant with the industry standard, each 
type of modem differs somewhat on the implementations and command details.

To offer the optimal flexibility, 3Com series Routers:

■

Provide the scripts (hereinafter refer to as modem script) for modem 
management, hence to enable the user to well control the modems connected 
to the router. Modem script can be executed by the following two means:

■

Execute a modem script directly through the 

 command to 

initialize the modem or other configurations.

■

Trigger the modem script with some special events, such as router startup, 
modem dial-in connection, the 

 command, etc.

■

Use the script along with the related commands can enhance the remote 
configuration function of router. If the asynchronous serial interface works in 
flow mode, the user can establish a remote connection to the interface via the 
dumb terminal or modem dialup, so as to configure and administer the router.

■

Directly send AT commands to the modem via the serial interface for managing 
the modem.

■

Intercommunicate with the equipment of other vendors. That is, the 
asynchronous serial interfaces of the participating parties are working in the 
flow mode and interconnected via modems.

■

Provide rich debugging information for modem maintenance and monitoring.

3Com series Routers provide the modem scripts, which are mainly used for:

■

Flexibly controlling the modems of different models. For example, using 
different initialization AT command strings can make the modems of different 
manufacturers or models to better interoperate with the 3Com series Routers.